that 是指同类异物这个题为什么用that

2个回答

很高兴为你解答.
One of the most important questions they had to consider was ( that )of public health .
他们必须考虑的重要的问题之一就是公共健康.
解析：that 在这里代指的就是 One of the most important questions .that 代指上文提到的同类事物,且是单数,如果是复数,就用those.因为句子里面有 one of 来限制,故后面用 that.
祝开心~!